OTHER FINANCIAL DATA - COMPREHENSIVE INCOME AND EQUITY 2 (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013		Sep. 30, 2013
Changes In Components Of Accumulated Other Comprehensive Income [Line Items]
Component Of Accumulated Other Comprehensive Income Loss, Beginning Balance	$ (219)	[1]	$ (376)	[1]
Other Comprehensive Income Before Reclassifications	(1)	[1]	(120)	[1]
Amounts Reclassified From Accumulated Other Comprehensive Income	5	[1]	281	[1]
Net Other Comprehensive Income	4	[1]	161	[1]
Component Of Accumulated Other Comprehensive Income Loss, Ending Balance	(215)	[1]	(215)	[1]
San Diego Gas and Electric Company and Subsidiary [Member]
Changes In Components Of Accumulated Other Comprehensive Income [Line Items]
Component Of Accumulated Other Comprehensive Income Loss, Beginning Balance	(10)	[1]	(11)	[1]
Amounts Reclassified From Accumulated Other Comprehensive Income	1	[1]	2	[1]
Net Other Comprehensive Income	1	[1]	2	[1]
Component Of Accumulated Other Comprehensive Income Loss, Ending Balance	(9)	[1]	(9)	[1]
Southern California Gas Company [Member]
Changes In Components Of Accumulated Other Comprehensive Income [Line Items]
Component Of Accumulated Other Comprehensive Income Loss, Beginning Balance			(18)	[1]
Amounts Reclassified From Accumulated Other Comprehensive Income			1	[1]
Net Other Comprehensive Income			1	[1]
Component Of Accumulated Other Comprehensive Income Loss, Ending Balance	(17)	[1]	(17)	[1]
Foreign Currency Translation Adjustments [Member]
Changes In Components Of Accumulated Other Comprehensive Income [Line Items]
Component Of Accumulated Other Comprehensive Income Loss, Beginning Balance	(96)	[1]	(240)	[1]
Other Comprehensive Income Before Reclassifications	5	[1]	(121)	[1]
Amounts Reclassified From Accumulated Other Comprehensive Income	0	[1]	270	[1]
Net Other Comprehensive Income	5	[1]	149	[1]
Component Of Accumulated Other Comprehensive Income Loss, Ending Balance	(91)	[1]	(91)	[1]
Foreign Currency Translation Adjustments [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
Changes In Components Of Accumulated Other Comprehensive Income [Line Items]
Component Of Accumulated Other Comprehensive Income Loss, Beginning Balance	0	[1]	0	[1]
Amounts Reclassified From Accumulated Other Comprehensive Income	0	[1]	0	[1]
Net Other Comprehensive Income	0	[1]	0	[1]
Component Of Accumulated Other Comprehensive Income Loss, Ending Balance	0	[1]	0	[1]
Foreign Currency Translation Adjustments [Member] | Southern California Gas Company [Member]
Changes In Components Of Accumulated Other Comprehensive Income [Line Items]
Component Of Accumulated Other Comprehensive Income Loss, Beginning Balance			0	[1]
Amounts Reclassified From Accumulated Other Comprehensive Income			0	[1]
Net Other Comprehensive Income			0	[1]
Component Of Accumulated Other Comprehensive Income Loss, Ending Balance	0	[1]	0	[1]
Unamortized Net Actuarial Loss [Member]
Changes In Components Of Accumulated Other Comprehensive Income [Line Items]
Component Of Accumulated Other Comprehensive Income Loss, Beginning Balance	(98)	[1]	(102)	[1]
Other Comprehensive Income Before Reclassifications	0	[1]	0	[1]
Amounts Reclassified From Accumulated Other Comprehensive Income	3	[1]	7	[1]
Net Other Comprehensive Income	3	[1]	7	[1]
Component Of Accumulated Other Comprehensive Income Loss, Ending Balance	(95)	[1]	(95)	[1]
Unamortized Net Actuarial Loss [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
Changes In Components Of Accumulated Other Comprehensive Income [Line Items]
Component Of Accumulated Other Comprehensive Income Loss, Beginning Balance	(11)	[1]	(12)	[1]
Amounts Reclassified From Accumulated Other Comprehensive Income	1	[1]	2	[1]
Net Other Comprehensive Income	1	[1]	2	[1]
Component Of Accumulated Other Comprehensive Income Loss, Ending Balance	(10)	[1]	(10)	[1]
Unamortized Net Actuarial Loss [Member] | Southern California Gas Company [Member]
Changes In Components Of Accumulated Other Comprehensive Income [Line Items]
Component Of Accumulated Other Comprehensive Income Loss, Beginning Balance			(4)	[1]
Amounts Reclassified From Accumulated Other Comprehensive Income			0	[1]
Net Other Comprehensive Income			0	[1]
Component Of Accumulated Other Comprehensive Income Loss, Ending Balance	(4)	[1]	(4)	[1]
Unamortized Prior Service Credit [Member]
Changes In Components Of Accumulated Other Comprehensive Income [Line Items]
Component Of Accumulated Other Comprehensive Income Loss, Beginning Balance	1	[1]	1	[1]
Other Comprehensive Income Before Reclassifications	0	[1]	0	[1]
Amounts Reclassified From Accumulated Other Comprehensive Income	0	[1]	0	[1]
Net Other Comprehensive Income	0	[1]	0	[1]
Component Of Accumulated Other Comprehensive Income Loss, Ending Balance	1	[1]	1	[1]
Unamortized Prior Service Credit [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
Changes In Components Of Accumulated Other Comprehensive Income [Line Items]
Component Of Accumulated Other Comprehensive Income Loss, Beginning Balance	1	[1]	1	[1]
Amounts Reclassified From Accumulated Other Comprehensive Income	0	[1]	0	[1]
Net Other Comprehensive Income	0	[1]	0	[1]
Component Of Accumulated Other Comprehensive Income Loss, Ending Balance	1	[1]	1	[1]
Unamortized Prior Service Credit [Member] | Southern California Gas Company [Member]
Changes In Components Of Accumulated Other Comprehensive Income [Line Items]
Component Of Accumulated Other Comprehensive Income Loss, Beginning Balance			1	[1]
Amounts Reclassified From Accumulated Other Comprehensive Income			0	[1]
Net Other Comprehensive Income			0	[1]
Component Of Accumulated Other Comprehensive Income Loss, Ending Balance	1	[1]	1	[1]
Financial Instrustments [Member]
Changes In Components Of Accumulated Other Comprehensive Income [Line Items]
Component Of Accumulated Other Comprehensive Income Loss, Beginning Balance	(26)	[1]	(35)	[1]
Other Comprehensive Income Before Reclassifications	(6)	[1]	1	[1]
Amounts Reclassified From Accumulated Other Comprehensive Income	2	[1]	4	[1]
Net Other Comprehensive Income	(4)	[1]	5	[1]
Component Of Accumulated Other Comprehensive Income Loss, Ending Balance	(30)	[1]	(30)	[1]
Financial Instrustments [Member] | San Diego Gas and Electric Company and Subsidiary [Member]
Changes In Components Of Accumulated Other Comprehensive Income [Line Items]
Component Of Accumulated Other Comprehensive Income Loss, Beginning Balance	0	[1]	0	[1]
Amounts Reclassified From Accumulated Other Comprehensive Income	0	[1]	0	[1]
Net Other Comprehensive Income	0	[1]	0	[1]
Component Of Accumulated Other Comprehensive Income Loss, Ending Balance	0	[1]	0	[1]
Financial Instrustments [Member] | Southern California Gas Company [Member]
Changes In Components Of Accumulated Other Comprehensive Income [Line Items]
Component Of Accumulated Other Comprehensive Income Loss, Beginning Balance			(15)	[1]
Amounts Reclassified From Accumulated Other Comprehensive Income			1	[1]
Net Other Comprehensive Income			1	[1]
Component Of Accumulated Other Comprehensive Income Loss, Ending Balance	$ (14)	[1]	$ (14)	[1]

[1] All amounts are net of income tax, if subject to tax, and exclude noncontrolling interests.